Will you be able to tell if you dislocated your shoulder?

Need an x-ray. A complete shoulder dislocation is a devastating injury that usually makes people go to an emergency room. An x-ray will confirm the diagnosis of a shoulder dislocation.
Yes. There will be an obvious deformity of your shoulder. Your upper arm bone will be sitting in front of and below where it normally would be.
MAYBE. Sually an acute dislocation is very painful, the arm will hang awkwardly and ur use of it will be very limited and painful. You may have heard and felt a popping sound or sensation. These injuries can self-reduce and become symptyomless, however, damage may still be present, the possibility of re-dislocation probable and treatment ranging from immobilization, phy therapy and surgery necessary.